Ответ:

1. was waiting, I arrived

2. did you

3. Did you go

4. you drove

5. took, didn't look

6. didn't know, did

7. saw, tried

8. walked, heard

9. wanted, changed

10. dropped, did, didn't break

Объяснение:

достаточно просто все глаголы в рамочках поставить в прошедшее время